Fix the generic type of Map.values for map literals.

sdk/lib/_internal/lib/js_helper.dart

Index: sdk/lib/_internal/lib/js_helper.dart
diff --git a/sdk/lib/_internal/lib/js_helper.dart b/sdk/lib/_internal/lib/js_helper.dart
index 6a6ff8e87ecc60e9fff2a3440edcaa07ee500bac..35cbc4a958e95ae8fb1969437fed26f4dbee1caa 100644
--- a/sdk/lib/_internal/lib/js_helper.dart
+++ b/sdk/lib/_internal/lib/js_helper.dart
@@ -30,6 +30,7 @@ import 'dart:_foreign_helper' show DART_CLOSURE_TO_JS,
                                    RAW_DART_FUNCTION_REF;
 import 'dart:_interceptors';
 import 'dart:_collection-dev' as _symbol_dev;
+import 'dart:_collection-dev' show MappedIterable;
 
 import 'dart:_js_names' show
     mangledNames,
@@ -1462,11 +1463,6 @@ makeLiteralMap(keyValuePairs) {
   return fillLiteralMap(keyValuePairs, new LinkedHashMap());
 }
 
-makeConstantMap(keyValuePairs) {
-  return fillLiteralMap(keyValuePairs,
-      new LinkedHashMap(equals: identical, hashCode: objectHashCode));
-}
-
 fillLiteralMap(keyValuePairs, Map result) {
   // TODO(johnniwinther): Use JSArray to optimize this code instead of calling
   // [getLength] and [getIndex].